Sinker mechanism for knitting machines



June 24 1924.

E. U. AMES SINKER MECHANISM FOR KNITTING MACHINES Filed June 15 1922Patented June 24, 1924.

'* NITED STATES PATENT oFFieE.

ELMER- U. AMES, PHILADELPHIA, PENNSYLVANIA, ASSIGNO'R TO H. BRINTONCOMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLF VANIA.

SINKER MECHANISM FOR KNITTING MACHINES. I

Application filed June 15, 1922. Serial No. 568,480.

To all whom it may concern:

Be it known that I, ELMER U. AMEs, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented a Sinker Mechanismfor Knitting Machines, of which the following is a specification.

One object of this invention is to provide a novel form of sinker foruse in circular knitting machinesywhich shall have a novel outline orform particularly adapting it to be positively rocked by suitably placedcams, while at all times preventing the pos sibility of its bodilymovement away from the cylinder.

A further object of the invention is to provide a novel combination ofparts including unyielding sinker-retaining means preventing the sinkersbeing bodily pulled out of the cylinder, while at the same timeretaining all of the advantages inherent in sinkers which rock.

Another object of my invention is to provide a novel combination ofsinkers and cams for operatively rocking the same, in

which-said cams shall also act to retain the fulcrums of the sinkers inengagement with the cylinder in which they are mounted the inventionmore especially having to do with a form of sinker including a shoulderbelow its butt positioned to cooperate with the cams for the abovepurpose.

These objects and other advantageous ends I attain as hereinafter setforth, reference being had to the accompanying drawings, in which,

Fig. 1 is a fragmentary vertical section of a needle cylinder withcertain of its associated parts, illustrating the sinkers con- Istructed and mounted in accordance with 4 my invention; and

Fig. 2 is a perspective view of one of the sinkers on a scale, whichlike that of Fig. 1, is greatlyenlarged.

In the above drawings, 1 represents a portion of a needle cylinder withwhich is associated a sinker ring 2 and a sinker cam ring 3. The topedge of the cylinder is formed with vertically extending slots 1 whilethe upper part of the sinker ring vertical slots 5 respectively in thesame planes as the slots 4, for the reception of sinkers 6.

Each of these sinkers consists, f a fl 2 is likewise formed with asecond series of piece of sheet metal having a laterally pro- Wardlyprojecting butt 8, a shoulder 9 between said butt and the bottom edge, anose 10 and a guide arm 11. The guide arm of each sinker extends intoone of the slots 4, while the shoulder portion 9 of the sinker operatesin one of the slots 5 in the same vertical plane ;-the ball 7 extendinginto an annular groove 12 formed in the outer surface of the needlecylinder 1. Between the nose 10 and guide arm 11 the upper part of thesinker is formed with a throat 13 and is rocked on its ball or fulcrumportion 7 by'a series of cams 14.-, of which the first is shown insection in Fig. 1;

It is particularly to be noted that each sinker is turned on its fulcrumthroughout its path of movement by the positive action of the variouscams and said cams are so mounted that by cooperation with the outeredge of the sinker and particularly that edge "of the shoulder 9immediately under the butt 8, they effectually prevent the possiblebodily movement of the sinker away from k the needle cylinder such asmight allow of its ball 7 getting out of the annular groove 12.- As aconsequence of this construction,

the operation of the sinkers is positive and can be accuratelypredetermined, it being a mechanical impossibility for their upper endsto fulcrum on the upper part of the needle cylinder with a consequentdislodge spite of its positive actuation of the sinkers they retain allof the advantages resulting from the fact that they are mounted to rockrather than move bodily.

I claim:

1. The combination in sinker mechanism of a needle cylinder; a sinkercam ring including a series of cams; and a series of rocking sinkersmounted in the cylinder, each having a butt whereby it is rocked by thecams and each also including a shoulder substantially normal to a radialline through the center of oscillation of the sinker and cooperatingwith the cams to prevent its bodily movement away from the cylinder.

2. The combination in sinker mechanism of a needle cylinder having anannular groove; a sinker cam ring including a series of cams and aseries of sinkers each having a fulcrum portion extending into radialline through the center of oscillation of the sinker and cooperatingwith the cams to prevent bodily movement'away from the needle cylinder.

3. As a new article of manufacture a sinker having a projecting fulcrumportion and an oppositely projecting butt; with a guide arm and a' nosetogether defining a throat, said sinker having an angular shoulder belowits butt substantially normal to a radialline through the center of saidfulcrum portion.

ELMER U AMES.

